Calcium Oxide
Quicklime, Burnt Lime
- CAS
- 1305-78-8
- EC
- 695-027-3
- Sectors
- Water & Wastewater Treatment, Building & Construction, Mining & Metals
Calcium Oxide (CAS 1305-78-8), also known as quicklime or burnt lime, is an inorganic, caustic and hygroscopic white powder produced by calcination of limestone, reacts exothermically with water to form calcium hydroxide, and is used in steelmaking, construction, water treatment and flue gas desulfurization.
Typical Properties
| Molecular formula | CaO |
|---|---|
| Molecular weight | 56.08 g/mol |
| Form | powder |
| Color | White to yellow-very slightly beige |
| Odor | wh. or gray cryst. or powd., odorless |
| Melting point | 2572 °C |
| Boiling point | 2850 °C |
| Density | 3.3-3.4 g/cm³ |
| Water solubility | REACTS |
| Flash point | 2850°C |
| pH | 12.6 (H2O, 20°C)(saturated solution) |
| GHS signal word | Danger · Corrosive, Irritant / harmful, Health hazard |
| HS code | 28259019 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Calcium Oxide
Applications
Used in steelmaking, construction, water treatment, and flue gas desulfurization. Also applied as a pH regulator and drying agent in chemical industries.
Safety & Risks
Corrosive and generates heat upon hydration; handle with gloves and eye protection. Avoid contact with moisture.
Packaging
Supplied in 25 kg bags or bulk silos. Store dry, airtight, and away from acids.